Pneumatic grain-conveyer.



PATENTED MAR. 3l, 1908..

F. CARLTON.

W. PNEUMATU GRAIN APPLICATION FILED SEPT'. 6, 1907A 2 SHEETS-SHEET l.

witnesses No. 883,292. PATENTED MAR. 31, 1908.

W. P. CARLTON.

PNEUMATIC GRAIN GONVEYER'; APPLICATION FILED snrlna. 1907.

2 SHEETS-SHEET 2.

atto'amup U'Nrrnn sfr-Arras PATENT OFFICE.

WLLIAM F. VARI/TON. GF DVANE, MISSOURI.

PNEUMATI GRAENCONVEYER.

Specification of Letters Patent.

Patented March 31, 1908.

aplicacion filed September 6. 1907. Serial No. 391.660.

the following is a specification.

This invention relates to pneumatic conveyers tor grain and other material, and has for its principal obiect to provide an improved mechanism tor introducing the material to be conveyed into the pil ev at a point in advance of the jet or stream o compressed air which is used as a'conveying medium.

A further object of the inventionis to provide an apparatus of this type which the grain isrforoed into the pipe by means of a feed screw which. will serve, also, as a valve to prevent blowing out ot the material.

With these and other objects in view, as will more Jfully hereinafter a pear, the invention consists incertain nove.. features o' construction and arrangement of parts, herein- .after fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of the struc ture may be made without departing trom the s irit or sacrificing any oi the advantages ot' t ie invention.

In 'the accornpanyinp, drawings :f Figure 1 is an elevation, illustrating a strain conveyingr mechanism arranged in accordance with the invention. Fig. 2 is a detail sectional viev.v on an enlarged scale oiE the means for feeding the material into the conveyor pipe.

Similarnumerals ol reference are employed to indicate corresponding, parts throughout the several ligures in the drawings.

The apparatus as sho-vn in Fig. 1 is intended for use in connection with a grain elevator, and in the lower portion or the building is a screw conveyor B by ufliiich the grain is moved toward an endless con veyer C, this conveyor carrying' the grain up to and dumping it within a hopper 10 in the upper ortion ot the building although -the genera arrangementoi the parts may be altered Where the conveying mechanism. is to be used for lifting the grain.

Arranged below the hopper is a conveyor pipe 11 one end of which is connected to a blast tan, 12, or other means for directing a blast ci air through the pipe. The opposite 'end of the pipe communicates with the tank,

-car or other pointy Where the grain or other material is to be delivered.

Mounted on the pipe is a vertically arranged casingr 15, at the upper end of which is the hopper 10. This casing is preferably cylindrical in form and is provided with upper and lower hearings for the support of a vertical shaft 16 on the upper portion of which is mounted a 'leed screw 17, the diameterof the screw being such'as to lit snugly Within the cylindrical casing. At the top of theishatt is a drive pulley 18 which may receive motion from any suitable source of power.

At one side of the lower portion of the feedl casing 15 is an openinthat is placed in communication with the conveyer pipe by a passage 2.0, and the grain or other material caught by the feed screw will be forced down through the casing and through this passage 20 into the conveyer pipe in a posit-ion intersecting the path of movement of the blastot air, so that the latter will carry the material through the pi e to the point" of discharge. ln order to adil to the eliiciency of the feed screw, the lower end of the shaft 16 is provided with a feed plate 21, which act: to direct the material from the lower portion of the casing proper through the passage 20.

lt will he observed that the diameter of the passage 2() and that ot the casingr 15 are approximately the same as the diameter ot the conveyer pipe, so that the pipe may be kept Well supplied with grain, and its effective area will not be reduced by the employmentof injecting nozzles and similar devices, as usual.

While in operation, the cylinder 15 and the passage 2O are kept constantly iilled with lrana so that 'it will be ditlicult for the air to torce its way out through the casing, particularly the 'leed screw is approximately equal to the internal diameter ol said casing. T his torni oi: feeding means may be ein ployed in connection with conveyer ipes arranged in any manner and employe( tor the carrying of material ot any character.

ln combination, a conveyer pi e, means for forcing a current ot air theret rough, a

2 saam feed casing, a passage connecting the lower l rny own, I have hereto affixed my signature endV ofd the ed (Inlasing to the ipe, ashaft arin the presence of two witnesses. ran e Wit in t e casin ,a orcing screw on v sai shaft, and-a plate arried by the shaft/ WILLIAM F' CARLTON' `g, and serving to direct the material outward Witnesses;

from the casing through said aseage. ,l CLARENCE SoHoNHoFF,

In testimony that Iclam t e foregoing as JOHN MATHENY. 

